JEE Main 2019 — Probability Question with Solution
From: JEE Main 2019 (Online) 12th April Evening Slot
Question
For an initial screening of an admission test, a candidate is given fifty problems to solve. If the probability
that the candidate solve any problem is
, then the probability that he is unable to solve less than two
problems is :
Choose an option
Show full solutionCorrect option: D
Correct answer
D
Step-by-step explanation
There are 50 questions in an exam.
So Probability of each question to be correct is p =
and also probability of each question to be incorrect is q =
Let Y is the number of correct question in 50 questions, hence required probability is
=
=
So Probability of each question to be correct is p =
and also probability of each question to be incorrect is q =
Let Y is the number of correct question in 50 questions, hence required probability is
=
=
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This is a previous-year question from JEE Main 2019, covering the Probability chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.